✨ Add Request and validation

bot/Bot.php

@@ -15,16 +15,18 @@ class Bot
         return $masters[array_rand($masters)];
     }
 
-    public function __construct(array $config = [])
+    public function __construct(Request $request, array $config = [])
     {
+        $this->request = $request;
         $this->config = $config;
     }
 
-    // TODO
-    public function isValid(Request $request): bool
+    public function isRequestValid(): bool
     {
-        $this->request = $request;
-        return $this->config['token'] === $request->getToken();
+        return hash_equals(
+            hash_hmac('sha256', $this->request->nc_random . $this->request->body, $this->config['secret']),
+            strtolower($this->request->nc_signature)
+        );
     }
 
     /**